[sdiy] new project working!!!

[Ian Fritz]

Hi Michael --

Interesting work, thanks for taking the time to post your results.

Your project is somewhat related to a waveshaper idea I have been working 
on.  My waveshaper will use an LM3914 also.  It will be driven by a 0-1 V 
sawtooth (audio).  The voltage across the divider chain will be varied from 
5 V to 1 V by a control voltage.   The odd-numbered outputs will be summed 
to drive a comparitor.  This will yield a train of pulses, with a single 
square wave when the CV is at 5 V, and with 5 pulses when the CV is at 1 
V.  I guess you could call it a pulse-number generator.  The lowest 
harmonic in the spectrum will be 1, 2, 3, 4, or 5, depending on the CV.

It seems you might be able to use a similar technique for your 
shaper,  controlling the voltage on the resistor chain rather than using 
the divider/multiplier arrangement.

Let me know what you think!

   Ian



At 06:16 PM 5/30/2003, Michael Ruberto wrote:
>Ok I have completed a preliminary schematic of what's on the breadboard so 
>far. This much of the circuit works good enough if you don't want to use 
>it to process control voltages. It needs the multiplier though for an 
>output that follows the input voltage level.
>http://www.sunrisecomputersolutions.com/samples/decimator.html